More Petrified Wood?

[kerrimarie805]

This is the second of three pieces I've recently picked up that I'm a little stumped by. I'm guessing they are all three petrified wood unless someone tells me otherwise. All three were found in western Nebraska not far from the North Platte River or the canal fed by the river. 

[Rockwood]

Swing, and a miss. Ball one. 

I wouldn't be able to call this a fossil.

[Rockwood]

No strikes in my ball park.